Maintenance method for polyvinyl chloride pipeline
Patent Information
- Application Number
- JP2022181389
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2021-11-12
- Filing Date
- 2022-11-11
- Publication Date
- 2025-10-01
AI Technical Summary
Vinyl chloride pipes used for drainage systems face issues such as clogging, corrosion, abrasion, and frequent maintenance due to dirt adhesion and softness, necessitating a method to reduce maintenance frequency and ensure reliable operation.
A method involving cleaning, drying, and applying a paint containing an antibacterial agent inside vinyl chloride pipes using a rotating shaft member with sponge-like or resin foam attachments to ensure uniform coating and protection against abrasion and bacterial growth.
The method effectively reduces maintenance frequency by ensuring thorough cleaning, uniform paint application, and antibacterial protection, thereby preventing dirt adhesion and abrasion, enhancing the durability and hygiene of vinyl chloride pipelines.
Smart Images
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Abstract
Description
Technical Field
[0007] ,
[0001] The present invention relates to a method for maintaining a vinyl chloride pipeline.
Background Art
[0002] Generally, pipes for water supply and drainage are laid in a house. While these pipes supply the water necessary for life, the generated domestic wastewater can be discharged outside the house.
[0003] In addition, the drain pipe is connected to the drain outlets provided in the kitchen, toilet, washroom, bathroom, etc. The domestic wastewater generated in life is collected from this drain outlet, aggregated at one place in the collective drain pipe in the residence, and discharged outside the house.
[0004] However, since domestic wastewater contains a lot of things other than water, there is a problem that blockages, corrosion, wear, etc. occur in the drain pipe, so regular inspection and maintenance are required.
[0005] By the way, in recent years, due to advantages such as easy procurement and handling of materials and low cost, vinyl chloride is often used for the materials of these pipes (hereinafter, the pipe composed of this vinyl chloride is referred to as "vinyl chloride pipe"). Generally, the description of vinyl chloride pipe is in Non-Patent Document 1 below.
Prior Art Documents
Non-Patent Documents
[0006]
Non-Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0007] However, as mentioned above, even if polyvinyl chloride is used for drainpipes, it is not possible to prevent the accumulation of dirt and grime inside the pipes, and regular inspections and maintenance are still necessary.
[0008] Furthermore, unlike metal, polyvinyl chloride (PVC) is soft, and polishing it with abrasives can easily wear it down, sometimes even causing it to crack. Therefore, it is essential to minimize the frequency of maintenance.
[0009] Therefore, in view of the above problems, the present invention aims to provide a method for reliably maintaining polyvinyl chloride pipelines with fewer maintenance cycles. [Means for solving the problem]
[0010] A method for maintaining polyvinyl chloride pipelines according to one aspect of the present invention, which solves the above problems, comprises the steps of: cleaning the inside of polyvinyl chloride pipes in a plurality of polyvinyl chloride pipelines connected to a drainage manifold in a facility; drying the inside of the polyvinyl chloride pipes; and applying an antibacterial coating to the inside of the polyvinyl chloride pipes.
[0011] Furthermore, although not limited to this viewpoint, it is preferable that the step of applying antibacterial paint to the inside of a polyvinyl chloride pipe includes the steps of pouring liquid paint into the drain port of the polyvinyl chloride pipe, and inserting a flexible rotating shaft member with a sponge-like member or resin foam member attached near its tip into the drain port, and rotating the rotating shaft member with a power member connected to the rotating shaft member while pushing the sponge-like member or resin foam member into the polyvinyl chloride pipe to adhere the antibacterial paint to the inside of the polyvinyl chloride pipe.
[0012] Furthermore, although not limited to this viewpoint, it is preferable that the step of drying the inside of the polyvinyl chloride pipe includes the step of inserting a flexible rotating shaft member with a cloth-like member attached near its tip into the drain port, and while rotating the rotating shaft member with a power member connected to the rotating shaft member, pushing the cloth-like member into the polyvinyl chloride pipe to wipe away the water inside the polyvinyl chloride pipe.
[0013] Furthermore, although not limited to this viewpoint, it is preferable that the rotating shaft member comprises a rotating core material and a covering material that is arranged around the core material, protects the core material, and does not rotate.
[0014] Furthermore, although not limited to this viewpoint, it is preferable that the step of applying antibacterial paint to the inside of the polyvinyl chloride pipe be performed from each drain outlet provided in the polyvinyl chloride pipeline. [Effects of the Invention]
[0015] In summary, the present invention provides a method for reliably maintaining polyvinyl chloride pipelines with fewer maintenance cycles. [Brief explanation of the drawing]
[0016] [Figure 1] This figure shows the steps of a maintenance method for a polyvinyl chloride pipeline according to the embodiment. [Figure 2] This is an illustrative diagram of a facility that may be subject to the maintenance method for polyvinyl chloride pipelines according to the embodiment. [Figure 3] This is an illustrative diagram showing the changes in the polyvinyl chloride pipe as a step occurs in the maintenance method for polyvinyl chloride pipes according to the embodiment. [Figure 4] This diagram shows a schematic representation of a rotating device comprising a rotating shaft member and a power member connected to the rotating shaft member, used in a maintenance method for polyvinyl chloride pipelines according to this embodiment. [Figure 5] This diagram illustrates an image of a cloth-like material attached to the tip of the rotating shaft member of a rotating device. [Figure 6]It is a diagram showing an image when a sponge-like member or a resin foam member is attached to the tip of the rotating shaft member of a rotating device. [Figure 7] It is an image diagram when looking down from above at a facility that can be a target of the vinyl chloride pipe maintenance method according to the embodiment. [Figure 8] It is a diagram showing a cross-sectional image when the rotating shaft member of the rotating device is eccentric.
Best Mode for Carrying Out the Invention
[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention can be implemented in many different forms, and the specific examples described in the following embodiments and examples can also be appropriately changed and adjusted, and are not limited thereto.
[0018] FIG. 1 is a flowchart for explaining the steps in the vinyl chloride pipe maintenance method (hereinafter referred to as "this method") according to the present embodiment. As described in this figure, this method includes (S1) a step of cleaning the inside of the vinyl chloride pipes in a plurality of vinyl chloride pipes connected to the drainage collection pipe in the facility, (S2) a step of drying the inside of the vinyl chloride pipes, and (S3) a step of applying a paint containing an antibacterial agent to the inside of the vinyl chloride pipes.
[0019] As described above, this method first has (S1) a step of cleaning the inside of the vinyl chloride pipes in a plurality of vinyl chloride pipes connected to the drainage collection pipe in the facility.
[0020] As described above, the cleaning target of this step is a plurality of vinyl chloride pipes connected to the drainage collection pipe in the facility. Examples of the facility include, but are not limited to, so-called condominiums and apartment buildings such as condominiums and apartments, and buildings where offices such as offices are occupied. However, as long as it has a plurality of drainage paths and is connected to the drainage collection pipe, for example, a single-family house may also be used.
[0021] Furthermore, the polyvinyl chloride (PVC) pipeline in this step is a cylindrical pipe made of PVC that is connected to a drain installed in a washbasin, bathtub, etc., and guides the wastewater generated in these facilities to a drainage manifold installed within the facility. The PVC pipeline may connect the drainage manifold and the drain with a single pipe, or it may be connected by branched pipelines. By providing branched pipelines, it is possible to construct a sufficient drainage network within the facility without unnecessarily increasing the number of pipes.
[0022] As described above, this step includes a step of cleaning the inside of the polyvinyl chloride pipeline. The cleaning step is a step of removing dirt accumulated inside the polyvinyl chloride pipeline, and examples of such methods include, but are not limited to, a method of supplying high-pressure water forcefully into the polyvinyl chloride pipe to remove mold and dirt etc. (hereinafter simply referred to as "dirt etc.") attached to the inside of the polyvinyl chloride pipe, a method of inserting a thin, long, flexible rod-shaped member with a brush or the like attached to the tip into the pipe to remove dirt etc. attached to the inside of the polyvinyl chloride pipe, and a method of introducing granular abrasive into the polyvinyl chloride pipe and removing dirt etc. with this abrasive. It is also very important to add a cleaning agent that makes it easier to dissolve the dirt etc. In addition, a flexible rotating shaft member with a relatively firm sponge-like member or resin foam member attached near the tip, as used in the step described later, may be inserted, and the rotating shaft member may be rotated by a power member connected to the rotating shaft member, while pushing the sponge-like member or resin foam member into the polyvinyl chloride pipe.
[0023] Furthermore, this method includes a step (S2) of drying the inside of the polyvinyl chloride pipe. If moisture remains inside the polyvinyl chloride pipe, problems may occur in the subsequent step of applying the paint, so it is necessary to dry it thoroughly.
[0024] The step of drying the inside of the polyvinyl chloride pipe is not limited to any method that can dry it, but blowing dry hot air into the polyvinyl chloride pipe is a simple and preferable method.
[0025] Furthermore, it is preferable that this step further includes the step of inserting a flexible rotating shaft member with a cloth-like member attached near its tip into the drain port, and while rotating the rotating shaft member with a power member connected to the rotating shaft member, pushing the cloth-like member into the polyvinyl chloride pipe to wipe away the water inside the polyvinyl chloride pipe. By pushing the cloth-like member in, it is possible to reach parts of the winding pipe route that are difficult to reach with wind, etc., and furthermore, it enables physical contact of the cloth-like member with the inner surface of the polyvinyl chloride pipe, making it possible to scrape out any dirt remaining inside the polyvinyl chloride pipe. Moreover, using a rotating cloth-like member has the effect of increasing efficiency. In this method, the rotating shaft member and the power member that rotates the rotating shaft member will be collectively referred to as the "rotating device".
[0026] Furthermore, in this method, it is preferable that the rotating shaft member of the rotating device comprises a rotating core material and a non-rotating covering material positioned around the core material to protect it. This arrangement has the advantage that, since the outer part does not rotate, even if the outer part of the rotating shaft member comes into contact with other parts, there is no entanglement due to the rotation of the core material, making it easy to stably insert or withdraw the PVC pipe. In addition, by providing a covering material, paint does not adhere to the core material of the rotating device, which does not hinder the rotation of the core material, thus making maintenance of the device easier.
[0027] Furthermore, this method includes a step (S3) of applying an antibacterial coating to the inside of the polyvinyl chloride pipe. By adding an antibacterial coating, it is possible to suppress the growth of bacteria that cause dirt inside the polyvinyl chloride pipe. In addition, by protecting the inside of the polyvinyl chloride pipe with the coating, it is possible to make it resistant to abrasion.
[0028] The antibacterial agent used in this method is not limited as long as it can suppress the growth of bacteria, but it is preferable that it contains silver. Including silver allows for effective application of the antibacterial effect. While the silver is not limited, it is preferable that it be in the form of silver nanoparticles from the viewpoint of improving dispersion performance. The diameter of these silver nanoparticles is not limited as long as they can be dispersed sufficiently uniformly, but for example, the average particle size is preferably between 0.1 μm and 100 μm, and more preferably between 10 μm and 10 μm. By setting the diameter to 0.1 μm or more, the antibacterial effect of the silver nanoparticles can be obtained, and by setting the diameter to 100 μm or less, the nanoparticles can be stably dispersed in a thin film without reducing the adhesion performance of the film, even when applied inside a pipe.
[0029] Furthermore, in this method, the antibacterial agent is preferably silver zeolite containing silver nanoparticles. Using silver zeolite has the effect of providing antibacterial and deodorizing properties. In this case, the preferred particle size is the same as in the case of silver nanoparticles described above.
[0030] Furthermore, it is preferable that the paint used in this method is miscible with an antibacterial agent, has high fluidity when applied, and achieves sufficient hardness after drying. While there are no particular limitations on specific examples, epoxy resin or a primer specifically for polyvinyl chloride (PVC) is a preferred example. Epoxy resin is a thermosetting resin having epoxy groups at its ends, and by mixing the main agent and the hardener, fluidity can be obtained initially, and sufficient hardness can be obtained after time has elapsed. A primer specifically for PVC has the characteristic of adhering firmly to the PVC surface.
[0031] Furthermore, while the amount of antibacterial agent in this method is not particularly limited, if it is too little, it will be difficult to obtain an antibacterial effect, and if it is too much, it will be difficult to obtain sufficient hardness in the resin. Therefore, it can be adjusted as appropriate, but it is preferable to keep it in the range of 1% by weight or more and 10% by weight or less, and more preferably 8% by weight or less.
[0032] Furthermore, in this step, as a method for applying antibacterial paint to the inside of the polyvinyl chloride pipe, it is preferable to pour the paint containing the antibacterial agent into the pipe in a highly fluid state, using a liquid paint from the drain outlet of the polyvinyl chloride pipe.
[0033] Furthermore, it is preferable that this step includes inserting a flexible rotating shaft member with a sponge-like member or a resin foam member attached near its tip into the drain port, and while rotating the rotating shaft member with a power member connected to the rotating shaft member, pushing the sponge-like member or resin foam member into the polyvinyl chloride pipe, thereby adhering the antibacterial paint to the polyvinyl chloride pipe. The device used here is preferably a rotating device similar to that in (S2) above, with a sponge-like member or resin foam member attached to its tip. That is, in this embodiment, the sponge-like member or resin foam member provided near the tip of the rotating shaft member may be fixed to the rotating shaft member or may be detachable from the rotating shaft member. If it is fixed, it is preferable because there is no risk of it falling out even when inserted into the polyvinyl chloride pipe and moved back and forth, and if it is detachable, it can be replaced with a cloth member or the like used in other steps, which has the advantage of not requiring many devices.
[0034] According to this step, although the applied paint has high fluidity, paint tends to accumulate on the lower vertical side of the cross-section of the polyvinyl chloride pipe, resulting in a situation where only a thin layer is applied to the upper side. However, by using a sponge-like member or a resin foam member and rotating it, as in this case, such unevenness can be prevented. In this case, it is preferable that the sponge-like member or resin foam member is offset from the center of its cross-section during rotation, i.e., eccentric. By offsetting the rotation from the center in this way, the force applied inside the polyvinyl chloride pipe is made different in the circumferential direction, which in turn makes it possible to apply the paint more uniformly. More specifically, the inside of a polyvinyl chloride pipe is basically straight, but these are combined to form a bent shape overall. In other words, the piping is not necessarily a straight line. Therefore, when a rotating shaft member is inserted into a polyvinyl chloride pipe, there is a relationship between the bend and gravity, and the center of rotation does not necessarily coincide with the center of the pipe. If it is not eccentric in that case, an imbalance may occur in the force applied inside the polyvinyl chloride pipe, resulting in uneven application of the paint. Therefore, by deliberately creating an eccentricity, the uneven vibration caused by rotation equalizes the contact with the pipe, thereby achieving uniform paint application.
[0035] In this case, the degree of eccentricity is not limited as long as it has the above-mentioned function, but when the distance from the center to the outer surface in the cross-section of the sponge-like member or resin foam member is taken as 1, it is preferably 0.05 or more and 0.5 or less, more preferably 0.1 or more and 0.4 or less, and even more preferably 0.3 or less. By setting the deviation to 0.05 or more, the effect of eccentricity can be obtained, and by setting it to 0.5 or less, excessive wobbling can be prevented. Note that if the cross-section of the sponge-like member or resin foam member is polygonal or has a complex shape, the center of gravity determined by its geometry will be the center. An image of this cross-section is shown in Figure 8.
[0036] Furthermore, if there are multiple PVC pipes extending from several drain outlets, it is preferable to perform this step from each drain outlet to the connection point (branching point) with the drain manifold or other PVC pipes. Doing so ensures that uneven coating is prevented.
[0037] As described above, this embodiment provides a method for reliably maintaining polyvinyl chloride (PVC) pipelines with fewer maintenance cycles. More specifically, the effects of this method can be described as follows: By using this method, internal cleaning can be performed safely even when using PVC pipes. In particular, even when using abrasives, since a coating is performed using resin, even if some material is removed by cleaning with abrasives, the thickness can be stably restored. In addition, because it contains an antibacterial agent, it is possible to suppress the growth of bacteria and the adhesion of dirt for a long period of time. Furthermore, in this method, since the sponge-like member or resin foam member is inserted into the passage while rotating, it is possible to uniformly apply a resin that has fluidity at the beginning of application into the pipe. In particular, the hardness and flexibility of PVC pipes are compatible with this sponge-like member or resin foam member, making it possible to ensure high uniformity. [Industrial applicability]
[0038] This method has potential for industrial use as a maintenance method for polyvinyl chloride pipelines.
Claims
1. cleaning the insides of vinyl chloride pipes in a plurality of vinyl chloride pipes connected to a drainage collection pipe within the facility; drying the inside of the vinyl chloride pipe; A method for maintaining a vinyl chloride pipeline, comprising the step of applying paint containing an antibacterial agent to the inside of the vinyl chloride pipe.
2. The step of applying a paint containing an antibacterial agent to the inside of the vinyl chloride pipe includes: pouring liquid paint through a drain outlet of the vinyl chloride pipeline; 2. A method for maintaining a polyvinyl chloride pipeline as described in claim 1, comprising the steps of inserting a flexible rotating shaft member having a sponge-like member or a resin foam member attached near its tip from the drain outlet, and rotating the rotating shaft member with a power member connected to the rotating shaft member while pushing the sponge-like member or the resin foam member into the polyvinyl chloride pipe, thereby adhering the paint containing the antibacterial agent to the inside of the polyvinyl chloride pipe.
3. The step of drying the inside of the vinyl chloride pipe includes:
2. A method for maintaining a vinyl chloride pipeline as claimed in claim 1, further comprising the steps of: inserting a flexible rotating shaft member having a cloth-like member attached near its tip through a drain outlet; and rotating the rotating shaft member with a power member connected to the rotating shaft member while pushing the cloth-like member into the vinyl chloride pipe, thereby wiping away water from inside the vinyl chloride pipe.
4. 4. A method for maintaining a vinyl chloride pipeline according to claim 2, wherein the rotating shaft member has a rotating core member and a non-rotating covering material disposed around the core member to protect the core member.
5. 2. The method for maintaining a vinyl chloride pipe according to claim 1, wherein the step of applying paint containing an antibacterial agent to the inside of the vinyl chloride pipe is carried out from each drain outlet provided in the vinyl chloride pipe.